Miami Dolphins running back Reggie Bush, left, is stopped with the ball by San Francisco 49ers strong safety Donte Whitner, right, during the third quarter of an NFL football game in San Francisco, Sunday, Dec. 9, 2012. (AP Photo/Ben Margot)

Miami cornerback Nolan Carroll (28) tries to stop 49ers wide receiver Michael Crabtree (15) during the first half of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Quarterback Colin Kaepernick (7) and coach Jim Harbaugh during the first half of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Kicker David Akers (2) after kicking a field goal with Punter Andy Lee (4) in the second quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Carlos Avila Gonzalez, The Chronicle

Kicker David Akers (2) after kicking a field goal with Punter Andy...

Kicker David Akers (2) after kicking a field goal with Punter Andy... Photo-3868050.53661 - SFGate

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49ers Gold Rush Cheerleaders during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Carlos Avila Gonzalez, The Chronicle

49ers Gold Rush Cheerleaders during the first quarter of the San...

49ers Gold Rush Cheerleaders during the first quarter of the San... Photo-3868052.53661 - SFGate

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Linebacker Patrick Willis (52) and Safety Donte Whitner (31) in the second quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Quarterback Colin Kaepernick (7) and Offensive tackle Alex Boone (75) and Center Jonathan Goodwin (59) on the line of scrimmage in the second quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Linebacker NaVorro Bowman (53 takes down Miami fullback Charles Clay (42) in the second quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Linebacker NaVorro Bowman (53 takes down Miami fullback Charles Clay (42) in the second quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

San Francisco Giants baseball player Sergio Romo at the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Brant Ward, The Chronicle

San Francisco Giants baseball player Sergio Romo at the San...

San Francisco Giants baseball player Sergio Romo at the San... Photo-3868057.53661 - SFGate

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Tight end Demarcus Dobbs (83) is down in the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Brant Ward, The Chronicle

Tight end Demarcus Dobbs (83) is down in the first quarter of the...

Tight end Demarcus Dobbs (83) is down in the first quarter of the... Photo-3868058.53661 - SFGate

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San Francisco 49ers running back LaMichael James carries the ball past Miami Dolphins defensive tackle Paul Soliai (96) during the first quarter of an NFL football game in San Francisco, Sunday, Dec. 9, 2012. (AP Photo/Marcio Jose Sanchez)

Photo: Marcio Jose Sanchez, Associated Press

San Francisco 49ers running back LaMichael James carries the ball...

San Francisco 49ers running back LaMichael James carries the ball... Photo-3868059.53661 - SFGate

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Miami wide receiver Davone Bess (15) is brought down in front of Safety Dashon Goldson (38) and Linebacker NaVorro Bowman (53) during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Carlos Avila Gonzalez, The Chronicle

the San Francisco 49ers game against the Miami Dolphins at...

the San Francisco 49ers game against the Miami Dolphins at... Photo-3868061.53661 - SFGate

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Linebacker Ahmad Brooks (55) and Linebacker NaVorro Bowman (53) take down Miami running back Lamar Miller (26) during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

49ers Gold Rush Cheerleaders during the first half of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Brant Ward, The Chronicle

49ers Gold Rush Cheerleaders during the first half of the San...

49ers Gold Rush Cheerleaders during the first half of the San... Photo-3868063.53661 - SFGate

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Quarterback Colin Kaepernick (7) throughs a complete pass in the second quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Quarterback Colin Kaepernick (7) during the first half of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Brant Ward, The Chronicle

Quarterback Colin Kaepernick (7) during the first half of the San...

Quarterback Colin Kaepernick (7) during the first half of the San... Photo-3868065.53661 - SFGate

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Miami running back Marcus Thigpen (34) runs through an attempted tackle by 49ers Linebacker Michael Wilhoite (57) in the first half of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Running back Frank Gore (21) breaks a tackle for Wide receiver Randy Moss (84) during the first half of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

San Francisco 49ers guard Mike Iupati (77) celebrates as running back Frank Gore (21) carries the ball into the end zone for a touchdown on a one-yard run during the third quarter of an NFL football game against the Miami Dolphins in San Francisco, Sunday, Dec. 9, 2012. Also shown are San Francisco 49ers guard Leonard Davis (68) and 49ers tight end Delanie Walker (46).

San Francisco 49ers cheerleaders perform during halftime of an NFL football game between the San Francisco 49ers and the Miami Dolphins in San Francisco, Sunday, Dec. 9, 2012. (AP Photo/Ben Margot)

Photo: Ben Margot, Associated Press

San Francisco 49ers cheerleaders perform during halftime of an NFL...

San Francisco 49ers cheerleaders perform during halftime of an NFL... Photo-3868069.53661 - SFGate

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Running back Frank Gore (21) runs for a first down during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Brant Ward, The Chronicle

Running back Frank Gore (21) runs for a first down during the...

Running back Frank Gore (21) runs for a first down during the... Photo-3868071.53661 - SFGate

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Safety Dashon Goldson (38) breaks up a pass during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Quarterback Colin Kaepernick (7) and Running back LaMichael James (23) at the line of scrimmage during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Scott Dunlap from Tico displays pages go 49ers cheerleaders before the 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012. Scott has been collecting calendar pages of the cheerleaders each game this season.

San Francisco 49ers quarterback Colin Kaepernick (7) is hit by Miami Dolphins defensive end Cameron Wake (91) after losing control of the ball during the first quarter of an NFL football game in San Francisco, Sunday, Dec. 9, 2012. Looking on is San Francisco 49ers tackle Anthony Davis (76) and guard Mike Iupati (77).

San Francisco 49ers quarterback Colin Kaepernick (7) is hit by Miami Dolphins defensive end Cameron Wake (91) after losing control of the ball during the first quarter of an NFL football game in San Francisco, Sunday, Dec. 9, 2012. Looking on is San Francisco 49ers tackle Anthony Davis (76) and guard Mike Iupati (77).

Quarterback Alex Smith (11) during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Brant Ward, The Chronicle

Quarterback Alex Smith (11) during the first quarter of the San...

Quarterback Alex Smith (11) during the first quarter of the San... Photo-3868090.53661 - SFGate

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Running back LaMichael James (23) during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Brant Ward, The Chronicle

Running back LaMichael James (23) during the first quarter of the...

Running back LaMichael James (23) during the first quarter of the... Photo-3868091.53661 - SFGate

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Quarterback Colin Kaepernick (7) is sacked for a 5 yard loss in the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Brant Ward, The Chronicle

Quarterback Colin Kaepernick (7) is sacked for a 5 yard loss in the...

Quarterbacks Colin Kaepernick #7 and Alex Smith #11 of the San Francisco 49ers take warm ups before their game against the Miami Dolphins at Candlestick Park on December 9, 2012 in San Francisco, California.

Running back LaMichael James (23) is down during the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Carlos Avila Gonzalez, The Chronicle

Running back LaMichael James (23) is down during the first quarter...

Running back LaMichael James (23) is down during the first quarter... Photo-3868094.53661 - SFGate

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Aldon Smith #99 of the San Francisco 49ers warms up before their game against the Miami Dolphins at Candlestick Park on December 9, 2012 in San Francisco, California.

Photo: Ezra Shaw, Getty Images

Aldon Smith #99 of the San Francisco 49ers warms up before their...

Aldon Smith #99 of the San Francisco 49ers warms up before their... Photo-3868095.53661 - SFGate

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Tight end Vernon Davis (85) is tackled after a reception and a four yard gain in the first quarter of the San Francisco 49ers game against the Miami Dolphins at Candlestick Park in San Francisco, Calif., on Sunday December 9, 2012.

Photo: Carlos Avila Gonzalez, The Chronicle

Tight end Vernon Davis (85) is tackled after a reception and a four...

Tight end Vernon Davis (85) is tackled after a reception and a four... Photo-3868096.53661 - SFGate

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San Francisco 49ers quarterback Colin Kaepernick during the first quarter of an NFL football game against the Miami Dolphins in San Francisco, Sunday, Dec. 9, 2012.

San Francisco 49ers running back LaMichael James carries the ball past Miami Dolphins defensive tackle Paul Soliai (96) during the first quarter of an NFL football game in San Francisco, Sunday, Dec. 9, 2012.

Photo: Marcio Jose Sanchez, Associated Press

San Francisco 49ers running back LaMichael James carries the ball...

San Francisco 49ers running back LaMichael James carries the ball... Photo-3868099.53661 - SFGate